.list_title {
  height: 44px;
  line-height: 44px;
  margin: 0 auto;
  font-size: 20px;
  letter-spacing: 1.2px;
  text-align: center;
  font-weight: bold;
}
.back_up {
  width: 200px;
  height: 100%;
  text-align: center;
}
.back_up a {
  display: block;
  height: 32px;
  width: 50px;
  margin: 0 auto;
  text-align: center;
  color: white;
  line-height: 32px;
  background-color: #dfdfdf;
 border-radius: 10px;
  cursor: pointer;
}
